The paper link is Lee et al., (2019).
4O5N_trimer.pdb is the crystal structure of the closely related A/Victoria/361/2011 H3N2 strain.
All of the data displayed in dms-view comes from the differential selection summary file https://github.com/jbloomlab/map_flu_serum_Perth2009_H3_HA/blob/master/results/avgdiffsel/avg_sel_tidy.csv.
The Jupyter notebook build_data.ipynb reads in the above summary file and generates the data file for dms-view, Lee2019.csv.